Marathon ProSeal Retrofit Drains
The economical ProSeal Retrofit Drains is simple to install and fits all standard roof drain sizes. The compression of the mechanical seal prevents water from backing up into the roof system.
Figure 1: The mechanical seal compresses to keep water from seeping into the roof system.
Features
- Available in long-lasting, heavy-duty copper or spun aluminum.
- 10-in. 3-bolt strainer high-density polyethylene (black plastic) dome standard— available in cast iron or aluminum.
- Bolt down clamping ring for single-ply systems.
- Variable-length copper outlets, up to 15-in.
Advantages
- Compression of mechanical seal eliminates water from backing up into roof system.
- Fits all standard sizes of roof drains.
- Easily installs from the rooftop using simple hand or power screwdriver with square head adaptor.
Size Chart
|
Type
|
Size (in.)
|
Length (in.)
|
|
Straight (STR)
|
Existing Drain Size
|
Outside Diameter
|
Straight
|
|
ProSeal (STR) 3
|
3
|
2.8
|
11
|
|
ProSeal (STR) 4
|
4
|
3.78
|
11
|
|
ProSeal (STR) 5
|
5
|
4.70
|
11
|
|
ProSeal (STR) 6
|
6
|
5.65
|
11
|
Options
- CR Clamping ring for straight styles only.
- Drain outlets may be ordered extended by 6-in.
- Cast iron stainer dome.
- Flange coatings: Asphalt, PVC or Plain (standard).
Installation Instructions
Preparation
- Remove existing strainer and clamping ring.
- Remove any other existing drain components as required to enable our Copper ProSeal Drain flange to lie flush on roof membrane.
- Remove any debris in the existing drain pipe that interferes with proper installation.
Installation
- Inspect the existing drain pipe to make sure there are no elbows that prevent the drain stem from being fully inserted into the pipe. If an elbow is present, follow directions on back page to shorten our Copper ProSeal Drain length.
- Insert Pro-Seal into end of drain stem and tighten screws enough to hold the seal in place during installation. (see below for additional instructions)
- Insert assembled Aluminator Drain into existing drain pipe until flange is flush on roof membrane.
- Alternately tighten seal compression ring screws with Pro-Seal Screw driver until hand tight. Copper ProSeal Drain body is correctly installed when pressure placed on drain body results in no vertical movement. Do not overtighten the screws.
- Secure the drain flange to the roof deck using a minimum of three fasteners that are evenly spaced around the flange. The flashing membrane must cover and extend past the fastener head. Flashing membrane must be installed per manufacturer’s specifications.
- Place Marathon's Aluminum Clamping Ring over metal studs and install supplied stainless steel nuts and washers.
- Tighten clamping ring against membrane flashing until secure. Do not over tighten as the possibility of the ring or studs could be damaged.
- Install Marathon's Aluminum Strainer by aligning screw holes with the holes in the clamping ring. Secure with screws provided.
Shortening Copper Proseal Outlet Length
You may need to shorten our Copper Proseal outlet length if the existing vertical distance is too shallow to accommodate our standard 12-in. long outlet. Follow these steps:
- Make sure there is at least 4-inches of distance in the existing pipe to accommodate your Copper ProSeal Drain.
- Cut drain stem to desired length and insert Pro-Seal. Leave at least 2.5-inches of the drain stem to accommodate the seal.
- Insert the Pro-Seal in the cut drain stem and tighten the seal screws.
- Once the drain and seal have been assembled, insert it into the existing water leader and complete installation steps 3 - 8 (above).
